Bobbin.



BOBBIN. APPLICATION FILED SEPT. 6, 1917.

Patented Jan. 14, 1919.

//- @gli @EUR 3HE IIIILRID BENJAMIN', 0F NEW YURII, 11|'. Y., ASSIGN'QR T0 DEBER. CURP@- TION, 0F I-IUPEIMIIJJE, IUIAISSCIIUSJETTS, .AI CUIIAPUIt/ATIN UI? MAINE.

specncation of Letters Patent. Pgtmtugdtmm, jMt, tgtwm Application led :september 1917. serial 1t o. 190,044.

To all 'whom t may concern:

Be it known that I, GEORGE IIILLARDJBEN- i JAMIN, of the city, county, and State of New York, have invented certain new and useful Improvements in Bobbins, of which the following is a specification.

This invention relates to bobbins of the type consisting of a shank made of wood or other material which has a tendency to eX- pand and contract when subjected to heat and moisture and subsequently dried, and a ferrule formed of metal, and adapted to surround the lower portion or head of the bobbin, and which in practice, coacts with the spindle which imparts rotation to the bobbin and which is subjected to heavy blows when the bobbin is inserted into and removed from a shuttle, as is the practice in automatic looms of the Northrop type.

In bobbins of the type described, it is found diflicult to permanently secure the ferrule to the bobbin. The expansion and contraction of the bobbin serves to change the diameter of the head of the bobbin relative to that of the ferrule, and the blows to which the ferrule is subjected acts to loosen the ferrule. When the bobbin and ferrule are not firmly united, it is difficult to place the bobbin upon a spindle, and further, almost impossible toy introduce the bobbin into a shuttle. The object of the invention, therefore, is to eHect a permanent union between the head and the ferrule, and to insure effective cooperation between the bobbin and the spindle,` and the bobbin and the shuttle.

The improvement is illustrated in the accompanying drawings in which Figure 1 is .a longitudinal section of the head of a bob bin with a ferrule in place but not united to i, the head. Fig. 2 is a cross section in the plane indicated by the line 2 2 in Fig. 1. Fig. 3 is a vertical section of the lower end of the completed bobbin.

As shown in Fig. 1 the bobbin has a shank 1 with an enlarged head 2 with a tapering shoulder 3 between them. The lower end of the head is reduced at 4 with a shoulder 5 between the said lower end or foot and the portion of the head of largest diameter. The head is provided with circumferential exterior grooves 6, and with an intersecting channel 7 open at both ends.

The ferrule comprises an external sleeve 10 adapted to surround the largest portion of the head 2; a contracted foot 11 with a IV'hen the ferrule and the bobbin are as- A sembled as in Fig. 1, the bobbin grooves 6 and the ferrule grooves 15 are preferably in register with each other and va space is left between the shoulders 5 and l2. The ferrule is substantially co-extensive with the head of the bobbin and is shaped to inclose the 'outer and inner surfaces and bottom thereof.

The top 16 of the sleeve 10 extends above the top of the channel 7 thereby forming a funnel between the sleeve and the inclined wall 3 of the bobbin.

The bobbin is thoroughly dried before the next step in the manufacture.

After the bobbin and ferrule have been assembled, as in Fig. 1, a hot fluid addition product. of phenol and formaldehyde is poured into the top of the sleeve 10 and it flows downwardly lthrough the channel 7 into the grooves 5 and 15, into the space between the shoulders `5 and 12 and linto all the crevices between the ferrule and the head. The same result can be obtained by dipping the lower end of the bobbin with its applied ferrule into hot Huid addition product. The hot duid `addition product also permeates the materialV of the bobbin head. This hot fluid material is preferably .the initial reaction product of phenol and formaldehyde described in the Wiechmann Fatent, No. 1,080,188, Decemlber 2, 1913, which is free from Water. This hot liquid addition product is viscous and sufficiently adhesive to firmly unite the ferrule and head. The hot fluid addition product may be forced under pressure into the crevices between the ferrule and the bobbin head.

After the addition product has been introduced, the end 16 of the ferrule is bent down against the inclined shoulder 3, as shown in Fig. 3. The addition product is then polylnerzed. This is done by subjecting the bobbin to a temperature of about 100 degrees centrigrade for several hours and under pressure if an addition product like that of the Baekeland Patent, No. 942,699, December 7, 1909, is employed.. 'Ihe temperature acts to convert the addition product from a liquid into a hard, elastic, compressible, water-proof, infusible body, insoluble in acids and most alkalies.

The addition product is indicated at in Fig. 3. It fills the grooves 5 and 16 and the space between the shoulders 5 and 12 so that it interlocks the ferrule and bobbin together.

Bobbins are used under different conditions. They may be used dry, where the expansion and contraction of the head is relatively small; they may be used wet in high temperature fluids, as in dyeing, steaming, etc., where the expansion and contraction of the head are relatively large. One object of the invention is to produce a bobbin which will not expand and contract when subjected to steaming; or in other words, to produce a bobbin in which there shall be no change in the characteristics of the bobbin as a whole, or difference in size between the ferrule and the head, which would result in loosening of the ferrule from the head.

The addition product acts as anv adhesive material in that it is absorbed into the interstices of the head and enters the corrugations of the head and the ferrule, thereby securing the head to the ferrule. The rolling down of the ferrule on the head serves as additional means for securing them together. The head is subjected to very heavy blows upon being forced in and out of the shuttle. These blows tend to separate the head from the ferrule. Bythe interposition of the condensation product, the blows are in effect cushioned, and the head remains in irm contact with the ferrule. Everyone familiar with the use, of bobbins in automatic looms, knows that a difficultywhich has been experienced with A 'Dobbin comprising a shank having an enlarged head, a series of concentric grooves in said head, a ferrule for the bobbin annular in form and provided with a series of concentric grooves in the outer wall of the annulus which register with those of the head, and an infusible, insoluble product introduced between the head and the fel-rule and filling the grooves in them.

In witness whereof, I have hereunto signed my name.

GEORGE HILLARD BENJAMIN. 

